Determination of Response Modification Coefficient for Steel Chimneys by IDA and Pushover Analysis

A.MEHRAZAD, TAHAMOULIRODSARI and B.MOHAMAD, AMIN SHARAFIANI and C.EHSAN, KHOSRAVI (2015) Determination of Response Modification Coefficient for Steel Chimneys by IDA and Pushover Analysis. In: Fourth International Conference On Advances in Civil and Structural Engineering - CSE 2015, 26-27 September, 2015, Kuala Lumpur, Malaysia.

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Industrial steel chimneys are in the group of the tallest shell shaped structures, and these structures are one of the most important parts of power plants. The main rule of chimneys is transferring Emissions resulting from fuels to the higher level of ground. In this article the capacity curve of the structure calculated by Incremental Dynamic Analysis (IDA) and nonlinear static analysis (pushover). Therefore, ductility, over strength, Deflection amplification factor and response modification coefficient were computed by considering capacity curve. For modeling of the chimney, finite element software ABAQUS is used. The results show good agreement between response modification coefficient obtained from IDA and poshover analysis with the coefficient that suggested by AISC code. Results show that response modification coefficient suggested by AISC code is conservative. At the second part two opening were added at the bottom of the chimney, and time history analyses for ten different earthquakes were applied on the chimney. Finally the value of Mises stresses compared for chimney with and without opening. The results show existence of opening increases significantly Mises stresses at the bottom of the chimney.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: steel chimney, response modification coefficient, IDA and pushover analysis, opening
Depositing User: Mr. John Steve
Date Deposited: 26 Apr 2019 04:42
Last Modified: 26 Apr 2019 04:42

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